Are there any differences in the profile structure of the different account types available?

Yes. The profile sections and tabs will vary depending on your profile's account type. Below there is a graphic description of the profile tabs for the different account types: 

Freelancer (translator and/or interpreter) account type*

*Student, End customer, Translation agency/company employee or owner, Vendor/advertiser to the translation industry and Other account types also have the profile tabs shown above.

Freelancer and outsourcer account type